I have problems to upload attachments to JIRA REST API using HTTP POST with the HTTP action. It works with text files (Content-Type: text/plain) but when I'm posting other files such as PDF and images the files are not uploaded correctly; they get the wrong file size and are not readable. I assume it's a problem with the encoding. I've tried to use the binary function on the file contents but it does not help. According to JIRA the REST API doesn't accept base64-encoded files.
Have anyone of you been successful in posting attachments (other than text files) to JIRA or another API?

